BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 VOL. 33, PP. 515-526 SEPTEMBER 1. 1922 



LATE PLEISTOCENE HISTORY OF THE LOWER MOHAWK 

 AND MIDDLE HUDSON REGION 1 



BY JAMES H. STOLLER 



{Presented before the Society December 29, 1921) 



CONTENTS 



Page 



Introduction 515 



Previous interpretations 516 



New facts and rediscussion 517 



General statement 517 



Malta delta stage 519 



Saratoga delta stage 519 



Coveville delta stage 521 



Origin of Saratoga Lake 521 



Origin of Coveville Inlet 522 



Development of the Round Lake- Anthony Kill Channel 523 



Development of the Aqueduct-Cohoes gorge of the Mohawk 524 



Deduction bearing on the Pleistocene history of the Champlain-Hudson 



Valley 525 



Introduction 



Some additional data gathered in recent field-work seem to alt'ord a 

 clear explanation of the drainage history of this region, about certain 

 features of which divergent views have previously been held, and also 

 have a bearing on the more general problems of the Pleistocene history 

 of the Hudson-Champlain Valley. The key to the drainage problems in- 

 volved is found in the repeated shifting of the course of the Iroquois- 

 Mohawk River as its flooded and sediment-bearing waters flowed across 

 an area from which the static waters of the Mohawk-Hudson region (here 

 referred to as Glacial Lake Albany) were receding. The origin and dis- 

 tribution of the sand-plains of the region, the origin of Saratoga Lake 

 and of Round Lake, of the "old channel of the Hudson west of Schuyler- 

 ville," and of the Coveville Inlet of the Hudson River are explained. 



1 Manuscript received by the Secretary of the Society February 3, L922. 



(515) 



